/* ============================================================
   Sharpa — Main Stylesheet (shared base)
   Used by: index.html, programm.html
   ============================================================ */

/* ---------- TOKENS ---------- */
:root {
  --petrol: #2D6A6A;
  --petrol-light: #3D8B8B;
  --creme: #F0EBE1;
  --amber: #C49A6C;
  --bg-light: #FAF9F6;
  --bg-medium: #EFECE7;
  --text-muted: #ADA9A1;
  --text-dark: #45433F;
  --text-black: #2B2A27;
  --success: #6B8F71;
  --error: #B85C4A;
  --info: #3D8B8B;
  --font-heading: 'Literata', Georgia, serif;
  --font-body: 'Source Sans 3', 'Source Sans Pro', sans-serif;
  --max-width: 1120px;
  --section-padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 4vw, 2rem);
}

/* ---------- RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 100%; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); font-size: 1.0625rem; line-height: 1.7; color: var(--text-dark); background: var(--bg-light); }
img { max-width: 100%; display: block; }
a { color: var(--petrol); text-decoration: none; }
a:hover { color: var(--petrol-light); }

/* ---------- TYPOGRAPHY ---------- */
h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--text-black); line-height: 1.25; font-weight: 500; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.4rem); margin-bottom: 0.5rem; }
p + p { margin-top: 1em; }

.label { font-family: var(--font-body); font-weight: 600; font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber); }

/* ---------- LAYOUT ---------- */
.container { max-width: var(--max-width); margin: 0 auto; }
section { padding: var(--section-padding); }

/* ---------- NAV ---------- */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(250,249,246,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--bg-medium); transition: box-shadow .3s; }
nav.scrolled { box-shadow: 0 1px 8px rgba(43,42,39,.06); }
.nav-inner { max-width: var(--max-width); margin: 0 auto; display: flex; align-items: center; gap: 1.5rem; padding: .9rem clamp(1.25rem,4vw,2rem); }
.nav-wordmark { font-family: var(--font-heading); font-weight: 600; font-size: 1.35rem; color: var(--petrol); flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: 1.75rem; list-style: none; flex: 1; justify-content: center; }
.nav-links a { font-size: .925rem; color: var(--text-dark); transition: color .2s; white-space: nowrap; }
.nav-links a:hover { color: var(--petrol); }
.nav-links a.active { color: var(--petrol); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: .75rem; flex-shrink: 0; }
.nav-lang { position: relative; display: inline-flex; align-items: center; }
.nav-lang-toggle { display: inline-flex; align-items: center; gap: .25rem; background: none; border: 1px solid var(--bg-medium); padding: .35rem .55rem; border-radius: 6px; font: inherit; font-size: .8rem; font-weight: 600; letter-spacing: .04em; color: var(--text-dark); cursor: pointer; transition: border-color .2s, color .2s; }
.nav-lang-toggle:hover { border-color: var(--petrol); color: var(--petrol); }
.nav-lang-toggle .nav-lang-chevron { width: 10px; height: 10px; transition: transform .2s; }
.nav-lang-toggle[aria-expanded="true"] .nav-lang-chevron { transform: rotate(180deg); }
.nav-lang-menu { position: absolute; top: calc(100% + .35rem); right: 0; min-width: 100%; background: var(--bg-light); border: 1px solid var(--bg-medium); border-radius: 6px; box-shadow: 0 4px 16px rgba(43,42,39,.08); padding: .25rem; list-style: none; margin: 0; z-index: 110; }
.nav-lang-menu[hidden] { display: none; }
.nav-lang-menu button { display: block; width: 100%; text-align: center; background: none; border: none; padding: .4rem .75rem; font: inherit; font-size: .8rem; font-weight: 600; letter-spacing: .04em; color: var(--text-dark); cursor: pointer; border-radius: 4px; transition: background .15s, color .15s; }
.nav-lang-menu button:hover:not(:disabled) { background: var(--bg-medium); color: var(--petrol); }
.nav-lang-menu button.active { color: var(--petrol); background: var(--bg-medium); }
.nav-lang-menu button:disabled { opacity: .4; cursor: not-allowed; }
.nav-login { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--bg-medium); background: transparent; color: var(--text-muted); cursor: not-allowed; transition: color .2s, border-color .2s; padding: 0; }
.nav-login:hover { color: var(--petrol); border-color: var(--petrol); }
.nav-login svg { width: 16px; height: 16px; }
.nav-login:disabled { opacity: .55; }
.nav-cta { display: inline-block; padding: .5rem 1.25rem; background: var(--petrol); color: var(--bg-light) !important; border-radius: 6px; font-weight: 600; font-size: .9rem; transition: background .2s; white-space: nowrap; }
.nav-cta:hover { background: var(--petrol-light); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: .5rem; margin-left: auto; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-black); margin: 5px 0; border-radius: 2px; }
@media (max-width: 980px) {
  .nav-inner { flex-wrap: wrap; }
  .nav-wordmark { flex: 1; }
  .nav-toggle { display: block; }
  .nav-links, .nav-actions { display: none; flex-basis: 100%; }
  .nav-links { order: 2; }
  .nav-actions { order: 3; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: stretch;
    padding: 1.25rem 0 .5rem; gap: 1.1rem;
    border-top: 1px solid var(--bg-medium);
    margin-top: .9rem;
  }
  .nav-links.open ~ .nav-actions {
    display: flex; flex-wrap: wrap; align-items: center;
    padding: .25rem 0 1rem; gap: 1rem;
    justify-content: space-between;
  }
}

/* ---------- SECTION DOTS (Floating Progress Indicator) ---------- */
.section-dots { position: fixed; left: auto; right: 1.5rem; top: 50%; bottom: auto; transform: translateY(-50%); z-index: 90; display: flex; flex-direction: column; gap: .85rem; background: transparent; backdrop-filter: none; border: none; }
.section-dots a { position: relative; width: 10px; height: 10px; border-radius: 50%; background: transparent; border: 1.5px solid var(--text-muted); transition: background .2s, border-color .2s, transform .2s; }
.section-dots a:hover { border-color: var(--petrol); transform: scale(1.15); }
.section-dots a.active { background: var(--petrol); border-color: var(--petrol); }
.section-dots a .dot-label {
  position: absolute; right: calc(100% + .75rem); top: 50%; transform: translateY(-50%);
  background: var(--text-black); color: var(--bg-light);
  font-size: .75rem; font-weight: 500; letter-spacing: .02em;
  padding: .3rem .6rem; border-radius: 4px; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
.section-dots a:hover .dot-label { opacity: 1; }
@media (max-width: 980px) { .section-dots { display: none; } }

/* ---------- BUTTONS ---------- */
.btn-primary { display: inline-block; padding: .85rem 2rem; background: var(--petrol); color: var(--bg-light); font-family: var(--font-body); font-weight: 600; font-size: 1rem; border: none; border-radius: 8px; cursor: pointer; transition: background .2s, transform .15s; }
.btn-primary:hover { background: var(--petrol-light); color: var(--bg-light); transform: translateY(-1px); }

/* ---------- FOOTER ---------- */
footer { background: var(--text-black); color: rgba(240,235,225,.6); padding: 3rem clamp(1.25rem,4vw,2rem); }
.footer-inner { max-width: var(--max-width); margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); align-items: start; gap: 2rem; }
.footer-brand { font-family: var(--font-heading); font-weight: 600; font-size: 1.2rem; color: var(--creme); margin-bottom: .5rem; }
.footer-tagline { font-family: var(--font-heading); font-style: italic; font-size: .9rem; color: rgba(240,235,225,.45); margin-top: .35rem; }
.footer-col { display: flex; flex-direction: column; gap: .4rem; }
.footer-col h4 { color: var(--creme); font-size: .85rem; font-family: var(--font-body); font-weight: 600; letter-spacing: .05em; text-transform: uppercase; margin-bottom: .75rem; }
.footer-col a { font-size: .88rem; color: rgba(240,235,225,.6); transition: color .2s; }
.footer-col a:hover { color: var(--creme); }
.footer-bottom { max-width: var(--max-width); margin: 2rem auto 0; padding-top: 1.5rem; border-top: 1px solid rgba(240,235,225,.1); font-size: .8rem; }

/* ---------- ANIMATIONS ---------- */
.fade-in { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }